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Keywords: input energy, momentary input energy, single degree of freedom, energy input history, decay characteristics.

Summary

A previous study of energy-based seismic design methods focuses on the total value of the input energy, ignoring the difference of the energy input histories. When the equivalent volume of seismic energy has been input into the structure in a different way, the structure response is quite distinct. In this paper, the seismic energy input history of a single-degree-of-freedom (SDOF) system is transformed into the time history of the momentary input energy histogram. Based on the statistical analysis of the momentary input energy histogram of 60 elastic SDOF systems under 100 ground motions, a simplified calculation model for the energy input history of SDOF systems is developed. The control parameters b and bc of the model are used to describe the decay characteristics of an energy input time-history and that of the energy input cycle-history. The spectrum of b and bc corresponding to different ratios of peak ground velocity to acceleration (V/A) ranges are investigated. The results show that the SDOF system of a shorter natural period experienced more half cycles under the same seismic excitation, and the intensity of the momentary input energy decays more slower with the increase of the half cycle number, although the seismic energy are input to the SDOF system in a shorter time interval.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 102 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: Paper 89 Decay Characteristics of Seismic Energy Input History in SDOF Systems Z. Liu¹, W. Chen¹ and K. Chen² ¹College of Civil Engineering Changsha University of Science & Technology, China ²College of Civil Engineering Hunan University, Changsha, China doi:10.4203/ccp.102.89 purchase the full-text of this paper Full Bibliographic Reference for this paper Z. Liu, W. Chen, K. Chen, "Decay Characteristics of Seismic Energy Input History in SDOF Systems", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 89, 2013. doi:10.4203/ccp.102.89 Keywords: input energy, momentary input energy, single degree of freedom, energy input history, decay characteristics. Summary A previous study of energy-based seismic design methods focuses on the total value of the input energy, ignoring the difference of the energy input histories. When the equivalent volume of seismic energy has been input into the structure in a different way, the structure response is quite distinct. In this paper, the seismic energy input history of a single-degree-of-freedom (SDOF) system is transformed into the time history of the momentary input energy histogram. Based on the statistical analysis of the momentary input energy histogram of 60 elastic SDOF systems under 100 ground motions, a simplified calculation model for the energy input history of SDOF systems is developed. The control parameters b and bc of the model are used to describe the decay characteristics of an energy input time-history and that of the energy input cycle-history. The spectrum of b and bc corresponding to different ratios of peak ground velocity to acceleration (V/A) ranges are investigated. The results show that the SDOF system of a shorter natural period experienced more half cycles under the same seismic excitation, and the intensity of the momentary input energy decays more slower with the increase of the half cycle number, although the seismic energy are input to the SDOF system in a shorter time interval. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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